Budget balanced sharing rules in Teams decrease the incentive of its members to spend effort. In case of strategic complements, this sharing effect is even stronger. The paper proposes a simple contract that may solve (or, at least: meliorate) this problem: Anti-Sharing. External Anti-Sharing provides an obligation for each team-member to pay a fixed sum to an additional player, the Anti-Sharer, who also receives the team output. He then pays a sum equal to the value of the actual team output to each member of the team. This contract may implement first-best effort. Internal Anti-Sharing puts one of the team members into the position of the Anti-Sharer. He then ceases to spend productive effort. Therefore, this contract cannot implement first-best outcomes. Anti-Sharing is a theory of hierarchies that is not based on command or monitoring, and is related to the theory of strategic moves.